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- Artikel-Nr.: SW10466
Cube Audio | Nenuphar (Seerose) Breitband-Lautsprecher 10 Zoll
Viele haben es versucht. Cube Audio scheint es gelungen zu sein. Selbst Nelson Pass hört damit. Warum nur? Breitbändern ist eigentlich eine physikalische Grenze gesetzt und die liegt so um die 20cm. Sind sie zu klein, leidet die Breitbandigkeit und die Gehäusekonstruktion muss viel zu viel übernehmen. Wird der Durchmesser zu groß, stören Partialschwingungen und Chassisgewicht die ungebremste Wiedergabe, die Breitbänder so einzigartig machen können. Einer neuartige Membrangeometrie und durch das höhere Gewicht bedingt ein neuer Magnet haben ermöglicht, was die Macher von Cube Audio fast selbst nicht mehr glauben wollten: einen 25cm Breitbänder, der nun praktisch alles kann - eine extrem ausgedehnte, homogene Abbildung ohne echte Schwächen. Der dafür benötigte Antrieb arbeitet mit 81 (!) kleinen Neodymmagneten, die die Magnetkraft im Luftspalt auf schier unglaubliche 2.4 Tesla beschleunigen. Neben den Innovationen, die bereits die anderen Cube Audio Breitbänder so besonders machen, verfügt der F10 Neo über einen besonderen, dreifachen Schwirrkonus, der jegliche Nervigkeit oder Kompressionseffekte zunichte gemacht hat und nebenbei der Namensgeber des Lautsprecher ist (Nenuphar=Wasserlilie). Das Gehäuseprinzip ist wie bei den anderen Cube Audio Modellen im finalen Entwicklungschritt als TQWT-Lösung ausgeführt. All die komplexen Versuche haben am Ende zu einer täuschenden Einfachheit geführt, die klanglich nichts weniger als sensationell ist. Das müssen Sie sich einfach anhören.
Cube Audio Nenuphar is a single driver loudspeaker based on Cube Audio F10 Neo speaker. State of art fullrange drivers combined with very effective TQWT enclosure result in real extraordinary experience. Modern, elegant design and high quality black or white piano finish makes the loudspeaker a beautiful addition to every style of interior. All drivers and loudspeakers are hand assembled in Poland. Pursuing highest quality and longevity, manufacturing process involves both artisan craftsmanship and modern precise computer controlled CNC machines.
All of Cube Audio fullrange drivers gain huge benefits from many innovative technologies and solutions used in those speakers. The proof is not only in the sound, but can be easily noticed in measurements of the both speakers. Frequency response is outstanding not only on the "on axis" measurement. The results are unprecedented.
Power: 40 W
Efficiency: 92 dB
Frequency response: 30 Hz - 18kHz ( 6db)*
Dimensions: 30 x 50 x 105 cm
Weight: 40 Kg
Why and how do we do it
We believe that fullrange speakers can create an illusion of live music that multiway loudspeakers struggle to match. Amazing soundstage, absolute holography, magical midrange, open and direct sound that gives you the most emotional presentation possible of your favourite music.
If you have ever heard a good implementation of a fullrange speaker, you know exactly what we are talking about.
We are very happy with the performance of Cube Audio 8" drivers. Plenty of positive feedback from our happy customers, very enthusiastic reviews, but there still was this ... "we should do more". We knew that if we wanted to go into "even more fullrange regions", we would have to increase the size of the driver. The answer was 10" design, and it happened to be a very good choice. First of all, the size increase is meaningful enough so that it really makes a difference, but on the other hand we had to overcome plenty of traps placed by mother nature. Physics is heartless and it really did everything it could to play with us "the hard way".
Research and development process of 10" drivers lasted for over an year. The goal was to end up with something completely new, that outperforms our 8" inch drivers in nearly all aspects. To reach our dream performance one thing was sure, due to increased moving mass, more powerful motor design was necessary. Two new motors were developed for that purpose. One being mixed ferrite & neodymium magnets assembly and the second one is constructed completely out of neodymium magnets. The full Neodymium magnet motor contains 81 magnets with combined weight of 1480 grams and is capable of delivering 2.4 Tesla in the magnetic gap that is 9 mm high.
The voice coil is completely underhung with +- 3 mm excursion in 100% magnetic field strength. Maximum excursion is +- 6 mm. Since the voice coil practically does not leave magnetic gap, with uniform field strength along all the gap height, the raw power, linearity and reduction of distortions are at their best. In order to maintain 0.01 mm tolerance of all elements, magnetic motor components are manufactured using computer controlled CNC lathes.
Another unique solution is a lower suspension commonly called the “spider”. After listening to the prototypes with manifold, even most advanced spiders available for speaker manufacturers, we agreed that we had to develop our own solution. The issue with the spider is that, by being a damper it dissipates the energy, that otherwise would be transferred into the speaker cone. It makes the speaker sound weak and dull, so we knew that it is an unacceptable way to go. We wanted a material that does not absorb energy and only transfers it.
After conducting many tests the solution was found and it turned out to be even better than we expected. It is 100 % linear within the maximum excursion of the speakers ( + - 6mm). It behaves like a spring. It does not consume the energy by damping, it just positions the voice coil in the magnetic gap. The downside of such technology is that each spider has to be milled with precise CNC machine. Nevertheless the advantages are obvious and totally worth it. In order to measure the actual compliance (amount of excursion under known force) of the suspensions, we designed and custom a made special device. You can see the graph with measurement comparison of our suspension and classical (resin soaked cloth) spider below.
Cones and wheezers
Connecting the dots
Once we had the motor ready and capable to control heavier moving cones and suspensions mass, it was time to do the cones. Plenty of experience for experimenting with 8" drivers came in handy. We knew where to start with. But that was basically it. 10" is a completely different beast. For a very long time we were not satisfied with the sound. There was a time where we didn't have more bass than from 8" driver which is basically pointless. Multiple times we had a prototype cone geometry that on measurements was absolutely linear and looking amazing to the point that studio monitors could be really envy, but the sound was dull and boring. Those times were very frustrating. Sometimes we thought that it is impossible to do a really amazingly sounding 10" fullrange driver. But we never gave up and experimented more and more with even more drive every next day.
It was definitely worth it. The final design consist of 4 cones. One being the main cone and 3 whizzer cones. The smallest cone is responsible for highest frequency range. With only one standard whizzer we never would never be able to go up to 18 kHz with a driver that in proper cabinet reaches 30 Hz region. So adding that little whizzer, solved one of the issues that we had. But there were plenty more of them. When you add a whizzer to the cone, there is additional interference between the cone and the whizzer. The mini high frequency whizzer and the main whizzer got together really well and the sound was way better than without it. There was still a geometry issue present though. Its diameter, height, surface, geometry, stiffness, damping, coating all are a part of final sound equation.
To achieve the right amount of sound pressure in desired frequency region the most important of them all is geometry. There was one geometry that gave us amazing rich, colourful midrange, but on the other hand it interfered with the main cone in such a way, that a mods were pumping up mid frequencies. Since "shouty" vocals were not desired, we had to do something about it. Here's where the third whizzer comes into play. That is a very elegant solution to change the interference mods of the whizzer and the cone. Due to changed geometry and distance, amplitude of the modes decreased. As a result overall sound became sweeter, richer and more natural. At that moment we knew that this is the way to go.
Thanks to all the technologies that we developed, we got more control over speaker behaviour, sound character, frequency response and Thiele - Small parameters, than ever before. We deeply believe that the drivers that we are presenting to you will satisfy your needs and are the fullange drivers that you were always looking for.
So as you can see, we are obsessed with pushing boundaries and finding the frontier of what’s possible within the fullrange speaker concept. We are driven by our passion and we will never stop looking for the best sound possible. It is not an 8 hour job for us we do it, because we love it. If you share our passion for full range speakers, look no further. You deserve them.
All of our speakers, cones and voice coils are made and manually assembled in Poland. We take pride in our products and we always aim for highest quality. Each speaker is tested for 24 hours before shipment to ensure highest quality.
Solutions and technologies used in F10 Neo fullrange driver:
Full neodymium magnet motor
Unique 3 whizzers design
Ultralinear low dumping spider
Full copper Faraday Ring
Underhung voice coil
Multicoated waterproof paper cones